OLED Encapsulation Dam Structure for Organic Overflow Control

A dam unit is formed in advance within the non-display area before the encapsulation process. This dam unit creates a physical barrier that prevents liquid organic material from flowing into the non-display area during manufacturing, thereby solving the overflow problem while maintaining encapsulation effectiveness.

The non-display area is segmented by the dam unit into a confined region and a restricted region. This segmentation creates distinct zones with different functions: the confined region contains the liquid organic material, while the restricted region prevents its spread to the non-display area, thus controlling overflow.

The dam unit is divided into multiple protrusions that extend from a base layer. This segmented structure provides effective overflow prevention through multiple barriers while maintaining relatively simple fabrication using standard photolithography and deposition techniques.

The dam unit is positioned only in the non-display area where overflow control is needed, rather than across the entire device. This localized approach provides the necessary confinement function without adding complexity to the display area or other regions where it is not required.

The reinforcing member is designed with multiple branches extending from a central structure. This segmented configuration provides multiple pathways for crack deflection and energy dissipation, significantly enhancing mechanical strength while using a relatively simple additive fabrication approach.

The reinforcing member is integrated with the dam unit structure, combining the overflow prevention function and the mechanical reinforcement function into a single composite structure. This merging reduces overall device complexity by eliminating separate components while achieving both functions simultaneously.